version 0.1

[LbmBenchmarkKernelsPublic.git] / src / BenchKernelD3Q19ListPullSplitNt2SIntrinsics.h

// --------------------------------------------------------------------------
//
// Copyright
//   Markus Wittmann, 2016-2017
//   RRZE, University of Erlangen-Nuremberg, Germany
//   markus.wittmann -at- fau.de or hpc -at- rrze.fau.de
//
//   Viktor Haag, 2016
//   LSS, University of Erlangen-Nuremberg, Germany
//
//  This file is part of the Lattice Boltzmann Benchmark Kernels (LbmBenchKernels).
//
//  LbmBenchKernels is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  LbmBenchKernels is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with LbmBenchKernels.  If not, see <http://www.gnu.org/licenses/>.
//
// --------------------------------------------------------------------------

#ifndef INDEX_START
	#error INDEX_START must be defined
#endif

#ifndef INDEX_STOP
	#error INDEX_STOP must be defined
#endif

	#define I(index, dir)	P_INDEX_3((nCells), (index), (dir))

	for (int blockedIndex = (INDEX_START); blockedIndex < (INDEX_STOP); blockedIndex += nTmpArray) {

		indexMax = MinI(nTmpArray, (INDEX_STOP) - blockedIndex);
#ifdef DEBUG
		memset(tmpArray, -1, sizeof(PdfT) * nTmpArray * N_TMP);
#endif
		for (int index = 0; index < indexMax; ++index) {


			adjListIndex = (index + blockedIndex) * N_D3Q19_IDX;

			pdf_C = src[I(index + blockedIndex, D3Q19_C)];

			#define X(name, idx, idxinv, _x, _y, _z)	JOIN(pdf_,name) = src[adjList[adjListIndex + idx]]; tmpArray[TMP_INDEX(index, idx)] = JOIN(pdf_,name);
			D3Q19_LIST_WO_C
			#undef X

			ux = pdf_E + pdf_NE + pdf_SE + pdf_TE + pdf_BE -
				 pdf_W - pdf_NW - pdf_SW - pdf_TW - pdf_BW;
			uy = pdf_N + pdf_NE + pdf_NW + pdf_TN + pdf_BN -
				 pdf_S - pdf_SE - pdf_SW - pdf_TS - pdf_BS;
			uz = pdf_T + pdf_TE + pdf_TW + pdf_TN + pdf_TS -
				 pdf_B - pdf_BE - pdf_BW - pdf_BN - pdf_BS;

			tmpArray[TMP_INDEX(index, TMP_UX)] = ux;
			tmpArray[TMP_INDEX(index, TMP_UY)] = uy;
			tmpArray[TMP_INDEX(index, TMP_UZ)] = uz;

			dens = pdf_C +
				   pdf_N  + pdf_E  + pdf_S  + pdf_W  +
				   pdf_NE + pdf_SE + pdf_SW + pdf_NW +
				   pdf_T  + pdf_TN + pdf_TE + pdf_TS + pdf_TW +
				   pdf_B  + pdf_BN + pdf_BE + pdf_BS + pdf_BW;

			dir_indep_trm = dens - (ux * ux + uy * uy + uz * uz) * 3.0 / 2.0;

			w_1_indep = w_1 * dir_indep_trm;
			w_2_indep = w_2 * dir_indep_trm;

			tmpArray[TMP_INDEX(index, TMP_W1)] = w_1_indep;
			tmpArray[TMP_INDEX(index, TMP_W2)] = w_2_indep;

			dst[I(index + blockedIndex, D3Q19_C )]  = pdf_C - omegaEven * (pdf_C - w_0 * dir_indep_trm);
		}

		#define LOOP_1(_dir1, _dir2, _vel, _vel_tmp) \
			for (int index = 0; index < indexMax; index += VSIZE) { \
				vui = VLDU(&tmpArray[TMP_INDEX(index, JOIN(TMP_,_vel_tmp))]); \
				vpdf_a      = VLDU(&tmpArray[TMP_INDEX(index, JOIN(D3Q19_,_dir1))]); \
				vpdf_b      = VLDU(&tmpArray[TMP_INDEX(index, JOIN(D3Q19_,_dir2))]); \
				vw_1_indep  = VLDU(&tmpArray[TMP_INDEX(index, TMP_W1)]); \
				\
				vevenPart = VMUL(vomegaEven, VSUB(VSUB(VMUL(voneHalf, VADD(vpdf_a, vpdf_b)), VMUL(vui, VMUL(vui, vw_1_nine_half))), vw_1_indep)); \
				voddPart  = VMUL(vomegaOdd,  VSUB(     VMUL(voneHalf, VSUB(vpdf_a, vpdf_b)), VMUL(vui, vw_1_x3))); \
				VSTNT(&dst[I(index + blockedIndex, JOIN(D3Q19_,_dir1))], VSUB(VSUB(vpdf_a, vevenPart), voddPart)); \
				VSTNT(&dst[I(index + blockedIndex, JOIN(D3Q19_,_dir2))], VADD(VSUB(vpdf_b, vevenPart), voddPart)); \
			}

		#define LOOP_2(_dir1, _dir2, _v1, _v2, _v1_tmp, _v2_tmp, _expr) \
			for (int index = 0; index < indexMax; index += VSIZE) { \
				_v1         = VLDU(&tmpArray[TMP_INDEX(index, JOIN(TMP_,_v1_tmp))]); \
				_v2         = VLDU(&tmpArray[TMP_INDEX(index, JOIN(TMP_,_v2_tmp))]); \
				vpdf_a 		= VLDU(&tmpArray[TMP_INDEX(index, JOIN(D3Q19_,_dir1))]); \
				vpdf_b 		= VLDU(&tmpArray[TMP_INDEX(index, JOIN(D3Q19_,_dir2))]); \
				vw_2_indep  = VLDU(&tmpArray[TMP_INDEX(index, TMP_W2)]); \
				\
				vui = _expr; \
				vevenPart = VMUL(vomegaEven, VSUB(VSUB(VMUL(voneHalf, VADD(vpdf_a, vpdf_b)), VMUL(vui, VMUL(vui, vw_2_nine_half))), vw_2_indep)); \
				voddPart  = VMUL(vomegaOdd,  VSUB(     VMUL(voneHalf, VSUB(vpdf_a, vpdf_b)), VMUL(vui, vw_2_x3))); \
				VSTNT(&dst[I(index + blockedIndex, JOIN(D3Q19_,_dir1))], VSUB(VSUB(vpdf_a, vevenPart), voddPart)); \
				VSTNT(&dst[I(index + blockedIndex, JOIN(D3Q19_,_dir2))], VADD(VSUB(vpdf_b, vevenPart), voddPart)); \
			}

		LOOP_1(N, S, vuy, UY);
		LOOP_1(E, W, vux, UX);
		LOOP_1(T, B, vuz, UZ);
		LOOP_2(NW, SE, vuy, vux, UY, UX, VSUB(vuy, vux));
		LOOP_2(NE, SW, vuy, vux, UY, UX, VADD(vuy, vux));
		LOOP_2(TW, BE, vux, vuz, UX, UZ, VSUB(vuz, vux));
		LOOP_2(TE, BW, vux, vuz, UX, UZ, VADD(vuz, vux));
		LOOP_2(TS, BN, vuy, vuz, UY, UZ, VSUB(vuz, vuy));
		LOOP_2(TN, BS, vuy, vuz, UY, UZ, VADD(vuz, vuy));

		#undef LOOP_1
		#undef LOOP_2

	} // loop over fluid nodes

	#undef I

	#undef INDEX_START
	#undef INDEX_STOP